java实现可视化日历

package 尚学堂;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;import javax.print.CancelablePrintJob;

/**
 * 可视化日历程序
 * @author lijiazhao
 *
 */
public class TestCalendar2 {
 
 public static void main(String[] args) throws ParseException {
 
// String str = "2020-9-10";
 DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 
 String str = df.format(new Date());
 System.out.println("北京时间："+df.format(new Date())+"\n");
 
 Date date = df.parse(str);
 Calendar c = new GregorianCalendar();
 c.setTime(date);
 
 int day = c.get(Calendar.DAY_OF_MONTH);
 int days = c.getActualMaximum(Calendar.DATE);
 
 System.out.println("日\t一\t二\t三\t四\t五\t六");
 
 c.set(Calendar.DAY_OF_MONTH, 1);
 
 for(int i=0;i<c.get(Calendar.DAY_OF_WEEK)-1;i++) {
  System.out.print("\t");
 }
 
 
 for(int i=1;i<=days;i++) {
  if(day == c.get(Calendar.DAY_OF_MONTH)) {
  System.out.print(c.get(Calendar.DAY_OF_MONTH)+"*\t");
  }else {
  System.out.print(c.get(Calendar.DAY_OF_MONTH)+"\t");
  }
  
  if(c.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY) {
  System.out.println(); //换行
  }
  
  c.add(Calendar.DAY_OF_MONTH, 1);
   
 }
 
 }
}